I'm sorry to hear that your Midwest is tip-stalling. Mine has a Brison 3.2 and flies and lands great. Have you checked the throws on both elevators to make certain they are equal throughout their range of movement? Also, if the ailerons are drooped at all, it will make the airplane tip-stall. Raising the ailerons just a little might help prevent that. Just a couple ideas to hopefully help your bird start flying properly.