Ah So Rod, as age 11 was given and new pocket knife and went right out and stabbed a tree with it - folded up slicing off tip of L 3rd finger at 30' angle though the nail. Still got a slightly sharper bird finger to remind me. I've had one set of cushioned fused to the tube which prevents the normal in bike method of renewal others can get by with. The adjustable iso's require ~ 1/4" slice off the RH side of front iso tube, which took me days of travel to shop after shop in NW Arkansas to finally find a tool die maker in the woods now far from me to get it done, with some trial error fitting so two trips in my case. For such a simple machine it sure is complicated to get one fully fettered, for as long as that may last.
Last time I got bad slice was up on ladder stripping hardened insulation off 240 v line to reconnect to shed an ice storm took down, telling myself you are not going to slip - you are not going to slip, ZIp to lay open 5th finer right through the last kunckle about 1/3 its depth. Had to get down d/t blood too sticky to work with and expected long lasting pain but wrapped a thin rubber flexable magnet around it and the deep joint pain dissapeared. Had long shopping tirp next day bandaid kept blood in but ok to grip wheel and items - until got home 8 hr later and grabbed a bad full of cans to rip open wound + deep joint stab pain, put back magnet ring and it got comfy in 10 min and let magnet on-off few more days and no more pain - unless I probed to make sure I'd really sliced it deeply, YEP it hurt that way but not otherwise. Burns too with a gauze so not to stick works a treat too. Baylor found the static weak magnet flux caused local cappilary beds to open and close and not just dry up or swell up with stagnat blood flow. Effect can take hours on bad injury but after a day or so can remove and effect lasts most of a day more - which can fool ya and awake crippled/swollen- till magnets back on and kept on for days till crisis past.
