Paul seems to be doing ok with his. They aren’t very complex so highly likely that a good clean, some lube and some fresh solenoid contacts will sort it. Therefore well worth investigating IMO.

Could you not use half the baffle ? 

Once the temps get slightly more conducive to crawling around the GT6, I'll pop the starter off and see what's what. Given Nick's misgivings, I'm resigned to possibly needing a "better" version, however figure it's worth pulling apart first even if to delay the inevitable!

Plumbing almost complete .

Tunnel protection . 

Bang goes that theory then 

6-3-2, and indeed the solenoid has a very intimate relationship with the cyl 6 downpipe.

Interesting. What exhaust manifold do you have? Possibly they don’t appreciate being barbecued by a 6-2-1 or 6-3-1 (though my ND has coped)

I stuck an RAC100 on the TR about nine years ago, and it has been (*fumbles for a piece of wood to touch*) faultless. The only difficulty it presented was the absence of a cold start connection for the new loom.