My wife just puts me in the out house.
All kidding aside here goes.
Given any rigid traditional rack you must first determine which corner is greater than 60 degrees and use that corner. If not convinced then try racking three balls in the other two and see how that works out. It won't.
When using the bigger angled corner you must push the stack to one side or the other and finese the balls together. Given that the rack is of good construction, the balls are a good quality set and the cloth/table are not jacked up you should come up with a perfectly tight rack.
Hope this helps. Glad some had fun. Sorry some didn't.
Mahalo,
Carl