Nope, twas me. Not been on here for a few days, so have only just seen this.

Andy - the brake lever I bought from JMo is definitely a BLR41. I've just been out to shed and checked. The R must have a different perch?

Uncle Ricky's warning about the extra effort required to operate a shorter clutch lever is worth heeding, IMO. The ASV levers are a lovely bit of kit, look great, and are excellent for on-road use. Offroad, I find that two fingered clutch feathering soon brings on the dreaded arm pump. For any serious offroading, I'm going to put the OE lever back on. Those with less weedy forearms than me may not find this to be a problem, of course!