Repro bracket, original No4T

[Peter Laidler]

One way you can make some adjustments for range collimation error is to lift the front or rear of the telescope slightly in the telescope bracket/cradle by using, say .015" brass shim in/around the bottom third of the cradle. Never done it myself but theoretically it MUST work as you are in effect lifting the grat post (which is a foresight isn't it?) by shimming the front cradle or lowering the grat, to a much lesser extent, by shimming the rear cradle. But rememberto just nip the taper lock cradle cap screws down until they bite and don't overdo it