I looked at a,"Chain Monkey" a few weeks ago.If they were a Tenner I might try one.
Something I'll add is that when I set the chain on my 1999 I double check my rear wheel alignment using a metal tape measure from the Front Sprocket axle centres to the rear wheel sprocket axle centres to be sure.This has shown me,on my bike at least,that I cannot trust the markings on the adjuster plates as they are slightly out with this.
Having had,"Crabbing" on some older motorcycles that were not set-up right I'm a little more vigilante these days