[jcg31]

Thanks all!
As Ken suggest, I have never layed or cut a brick before this project, everything I have learned has come from you folk. Jim has built a wonderfully supportive community here, once snagged you feel compelled to contribute. Actually the only reason I found FB is that my wife wouldn't let me cut the oven cleaning safety latch to get a better crust (as discussed on another site). So back on the web for alternatives, the resultant adventure and expense is entirely her fault - - the most enjoyable project I have ever undertaken. Again, thanks to all.

I mentioned above that I had not used the platform attachment, well that ended on course 13 with the lack of space for the clamp, even without the clamp attached, the guide was a bit clumbsy so I went with the platform (See attached jpegs). Simply a 3/8" nut center-welded to a 2x2.5" piece of steel with three screw holes to mount to 1/4" plywood circle. The 1-1/8" holes in the plywood are to make it easy to turn to adjust height from above and reach the wingnut below to lock in place (The locking part was a bit overengineered, with the first brick placed it isn't going anywhere).

Made great progress this weekend, today (I took day off) is keystone day!

Jim