For the want of better entertainment, I decided to build a garden slide for No. 1 offspring. Just got to the stage where I join the two sides of it together with a dozen or so cross members that will eventually also have the slidey bit on top of them.... so far so good....
The slide surface itself will be laid up using thin laths bent around these (profiled) cross members - thus giving a nice surface with compound curves. Each cross member will be rebated into the sides of the slide in positions chosen to get a nice profile to the slide rather than necessarily evenly spaced. It will be easy enough to get the positioning right "by eye" on the first side. However I then need to transfer each of these rebate positions to the opposite side of the slide reasonably accurately if I am to end up with something not too wonky!
Other than painstakingly measuring each rebate position, reversing it, then drawing it out on the other side - can anyone think of a neat trick for transferring a set of positions from one side to the other?