My Airtronics receiver cases keep cracking. Any ideas on ways to make them stronger or is there is a better receiver I can use that doesn't crack?

I've never had one crack in two years, might just be lucky. One thing you can do to 'cushion' it is use two pieces of servo tap stuck together rather than one..... it will sit on a 'softer base' with dbl tape.

Are you bashing it or racing it?

Just gotta be more careful with them, I wish mfgs would make them a little better to withstand some of the manfisted mechanicing we do sometimes. Some rx's are a bit better than others but it's not a factor in my decision on what to run. Iv'e cracked plenty so I just take a more care now.