novocaine
Old School Grand Master
no 1 eyeball is fine for a check, but I've found the tool to be very very useful.Do you need the highly specialist tool to do this right? Wondering whether my standard approach of eyeballing is working or just haven't come across a bent one yet!
I made my own from a length of 1" box section and rear wheel axle. the 2 kids bikes I've just serviced were so far out that it was obvious they wouldn't shift just from an eyeballing, but the tool was needed to set it.