[Ignatz]

Oh..And this bad boy is MINE in April....

Here's my current "bad-boy", and a typical view of M13:

Discovery 10" PDHQ Dobsonian

[RightWhale]

I have often wondered at the alt-az mount of these cannon. I have built ordinary equatorial mount scopes, grinding glass and all, but never thought to use an alt-az mount. Would it be difficult to mount the cradle at the polar angle? You'd have to add a bracket over the declination bearing and the range of declination would be restricted, but it would still be simple enough.