About 2 weeks ago I installed the tortoises I had on hand and after the scotch lock nightmare I had my first crossover operating. The two wire ones are fine but those friggin 3 wire ones just didn't want to make continuity!! I managed to get a couple shots of that progress 2 weeks later because my camera had to be fixed which ended up being free because of a manufacture defect Canon recognized.
I received my ebay win from ebay so I installed a tortoise on my other crossover using this technique I saw in an article some place.
Front view
Side view
This took some figuring out how to get the top of the quick clamp to go through the level but it works quite nicely because as you tighten the clamp it moves the level up and you press against the switch machine just enough so you can still make adjustments.
Jake