Like what casque is saying, I have some scraps of material kicking around I use as feeler gauges - like if you wanted a 3mm narrower chainline you could take a 3mm thick scrap of plastic and see if it will clear, to save a little disassembly/reassembly. I have a few pieces in 2, 3, 5mm thick to test this.
Feb. 16, 2021, 7:10 a.m. - mrbrett
Like what casque is saying, I have some scraps of material kicking around I use as feeler gauges - like if you wanted a 3mm narrower chainline you could take a 3mm thick scrap of plastic and see if it will clear, to save a little disassembly/reassembly. I have a few pieces in 2, 3, 5mm thick to test this.