I am shopping for tires for my Archer and trying to decide whether to go with 4 or 6 ply. I'm pretty sure I will be going with a Michelin Air because I want a long lasting tire that is not too heavy. I fly roughly 100 hours a year. Should I buy 4 or 6 ply? My understanding is that more plys is more strength. More plys usually more cost, but with the Michelin Air the 6 ply is actually a couple of bucks less expensive. Thanks