Situation: JD 3720, FEL, Rimguard in R4 15-19.5 tires. Moderate success with snow removal last year. Mix of blacktop, dirt and gravel drive, 900' long and hilly. Just purchased tirechains.com 2 link chains w/o V-bars. Will these fit without putting the tires in the wide mode without interference?? Looks tight to me. In switching the tires from narrow to wide is this a home job or better left to professional due to weight of tire. Any tips appreciated.