Looks like the Rohm Twinmaster top would be good for HFT, but not suitable for the UBC competitions. Whilst the Rohm Trainer would be suitable for the latter.

I'll take a look at the Brococks etc as well.

I knew I should never have started reading these threads. A couple of months from now I probably have two or three pistols and be collecting all the clobber and gadgets that invariably go with any shooting discipline. Bugger.