As part of my leisurely DIY 2 year, 12,000 mile service, today was the turn of the spark plug change, after my new slimline 14mm socket arrived. Cheap as chips online purchase. Just when I thought I had everything in the toolbox, I found that the deep plug spanner that fitted a GS12 was far too big (16mm) to fit the RS. I knew I had the coil puller tool. Which is where I came unstuck, as the standard BM crash bars get in the way of the coil puller. No problem. A quick hacksaw cut, 2 Wee holes and a piece of string and I have a new Slimline Coil Puller tool. Not patented so feel free to copy Pulled the RHS out no problem, but the LHS would not clear the crash bar without slackening the 3 crash bar mounting bolts. Then I was home and dry for a quick plug change. The old plugs were in reasonable shape - well the bike was running perfectly a few days ago. I spun the new plugs in very carefully with my fingers to ensure that no threads were getting crossed as these must be the deepest plugs I've ever met. With no torque wrench that can deliver 12 Nm accurately, the final tightening was done with my calibrated right hand. No grunting. Probably less than a quarter turn from finger tight to TIGHT. In fact I backed them out and re-tightened them a second time to ensure I got the crush washers right.