Folks I've seen Dave's scope, his various mods are ingenious and well executed, and this really is a great scope for anyone who is after a 10" dob.
I honestly don't think you would do better.
I'd buy it myself if I had the bucks to spare, but the bills are piling up including car rego again shortly (there's irony, 2 years ago I was buying my first scope, and I paid 6 months rego on the car instead of 12 months in order to afford the 10" GSO dob, instead of the 8" I was going to get!)
Please spare me the temptation and pm Dave now!