Here's an extract from another thread:[IMG]http://i80.photobucket.com/albums/j183/gwa_2006/Avatars%20etc/aussie-emoticon1.gif[/IMG]"Geoff Walton:
I guess it's because the bulk of the faq was written before the Mk3 became old enough for owners to get into DIY, and problems started to occur which aren't covered by warranty. So I agree with you that we need to get more stuff on the Mk3 into the FAQ, I've copied your text and will knock soething out soon, did you take any pics by any chance?"Hi Geoff, yes I was surprised with how little specific info there is about the Mk3 NC on this forum. Perhaps you will add my console removal post to the faq and we can build some useful stuff.I’m happy to put the FAQ together, but I need input from you guys/gals. Please reply to this thread with any anformation you have that will ad to the geneal knowledge base about the NC MX5. Links to other threads are very welcome. I have already earmarked a couple of likely topics, and will sort those in the next few days, you will see that posts that have been made will be heavily edited to get to the “meat” of a topic, so please understand why your comments may have been removed.
Hi Geoff,
Many thanks for doing this. Your boundless enthusiasm is err… boundless 
My thoughts would be for a separate Mk3 FAQ rather than mixing it with Mk1/2. I’d make the Mk3 FAQ section headings first then put the posts in as and when they appear rather than trying to amass the content first.
Going this route would also help when Mk4 comes along…
I know much is available from manuals and the web but it would give a home to those tips and warnings which we only find in practice.
Mk3 FAQ
Vehicle data section
weight dimensions fluids
popular settings and torques
bulb list
Engine
spark plug change
oil and filter change
serpentine belt change
Transmission
Gearbox oil change
Diff oil change
Brakes
Front pads and discs change
Rear pads and discs change
Suspension and steering
Drop link change
Suspension unit change
Wheels and tyres
Body
Trim/console/audio tips
Electrical
Battery
Bulb change method
etc etc
When did the Mk3.5 arrive on the scene?
Rod
Late 2009 for the Mk3.5
What’s the difference between a 3 and a 3.5, the wings seem to have been flared on the 3.5 but does it go deeper than that?
This page here has a good detail of what wasd changed between the Mk3 and Mk3.5:
http://www.carenthusiast.com/reviews.html?mode=article&id=3000
Does anyone know if a 3.5 front section will fit onto a Mk3? 
Hi Don
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On a visit to MX5parts in Portsmouth last year, they told me that they had carried out this mod for one of their customers. I cant remember the nitty gritty of the conversion but you will need the MK3.5 headlights.
Perhaps it is worth a call to them!
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Hope this helps
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Richard.
Richard
Thanks that is very helpful. I’ll give them a ring to see what cost/work is involved. Might be cheeper to buy a 3.5 
I had a very positive reply from Andy (Thanks Andy) at MX5parts and yes it can be done 
The cost of the parts would be in the region of £1400 then there is painting and fitting. The rear lights can be upgraded to. 
I would only do it if I was unfortunate enough to have some accident damage etc. I’ll put my £2k towards a Mk 3.5 when the time comes.
Don
I can’t honestly say there is anything about the 3.5 that would warrant me changing from my ‘Niseko’ PRHT, however I was amazed to discover that Mazda have fitted a sound box that feeds into the cabin so that the driver thinks the car sounds sportier. Mazda, that is a cheap comical gimmick.
The addition of dialable seat heaters is good though, just a pity the wiring etc is different to the MK3, otherwise I would have switched them (excuse the pun). Oh and the door cards look better, but again I am told they wont swap.
Moss UK, have just launched a new rear spoiler for the Mk III, looks tidy and includes a 3rd brake light but unfortunatly wont fit the PRHT…
See here
mmm, looks good 
Well, many folk fit “sportier” exhausts for no other reason than the sound and that’s perhaps more antisocial as it affects other folk whether they like it or not. Harley made claims to their sound and MGBs are known for theirs. Even a Peugeot 306 GTi 6 I had 15 years ago had a tuned “manifold rasp” which was so obvious it really grated after a while. When I asked the dealer about it in case there was an air leak he said it was done to sound sporty and many folk liked it… 
Does anyone know the suspension differences between the MK3 and MK3.5?
I am mainly interested in the shock absorbers/springs combination, are they interchangeable between the two cars?
Thanks!