NC Superpro rear bush question/puzzle

  1. My model of MX-5 is: Mk3.5 PRHT BBR Turbo
  2. I’m based near: Glasgow
  3. I’m looking for technical help or recommendations on: superpro bush for rear upper control arm

I’m looking at rebushing my rear suspension with superpro but am a bit confused by the rear upper control arm bush

My understanding was that all the rear bushes were the type with inner crush tube and outer PU “bobbin”, ( and the others powerflex etc) seem to be this type

However superpro shows this with the steel outer ( p/n SPF3401K) , for the rear upper control arm ONLY (all others are the crush tube/bobbin type

Has anyone fitted these and is it a diy-able job or is a press needed ?

( I have a set of proper bush tools with threaded rod & inserts etc but not sure it would be up to this )

I’ m tempted to polybush the rest and get a new arm with prefitted bush for this one rather than mess around trying to fit it

thks

Jim