is it possible to change atv tires yourself?I have access to a hydrolic press or something similar at work if thats needed.ive heard the tires are hard to remove from the rim, also how hard is it to get the new tires to seat?Im just trying to avoid an extra 50 or so dollars to have 4 tires mounted. the tires are 16x7.0x8 . so they are pretty small.any help would be appreciated.thanks,Dave