For the past several months, I have been reading about a neat little Digital Angle Gauge made by the Wixey company.
Wixey Digital Angle Gauge
It's main use is in the woodworking field, but when I was trying to check some alignment measurements last night to figure out my swingarm issue, this little gizmo would have really come in handy.
To use it, you zero it out to a common reference point and then transfer it to a different point to measure the relative difference. Setting saw blade angles is a natural, but I'm looking to see if I have a vertical alignment problem at the rear wheel which is causing the shock mounting issue I have.
They sell at Rockler, Woodcraft, on-line and I'm sure other wood working outlets when you can find them. They seem to be flying off the shelves as fast as they can get them in.
I'm going to pick one up today and report back on how well it works. I'm pretty sure it will become one of those items that as soon as you have it, it will get used for lots of stuff.