On Wed, 05 Feb 2020 22:28:35 -0800, Frank Whiteley wrote:

On Wednesday, February 5, 2020 at 9:44:53 AM UTC-7, Dan Marotta wrote:
I don't think drilling holes for safety pins would weaken the
uprights very much, but I would drill the holes for the set screws to
fit into.Â* Maybe even thread them.


230lbs/panel. Locking pin should be doable.


I like Dan's idea - much less chance of losing the pin and the clamp
still works at other heights.


--
Martin | martin at
Gregorie | gregorie dot org