A photo would help.

Since you're using the hollow beam- are you sliding the uncut end form into the hollow beam, or are you cutting the end form to match the shape of the (appropriately trimmed) beam?

And to double check- does the total height of your end forms equal the total height of your station forms (if you're off .5" on top, you should be off -.5" on the bottom, right?)

C.

: Kinda surprised that no one's answered this. I've only done external
: strongbacks but have read about the internal one. Usually the forms fit a
: little loose so you can shim them so they are perfectly lined up. For me
: anyway, darned near impossible to cut wood forms precise enough that they
: are perfectly lined up without shimming.

: Hope this helps, maybe Nick can help more?

: Bill H.