My son and I are thinking of going in together on a full size pratice tree. I was just wondering how many of you have one and how often you use it? I already have a portatree. I was also wondering how hard it would be to use a full size practice tree to do a little 4 wheeler drag racing in our yard. Thanks in advance and merry christmas P.S I just got my engine back in the car only 6 months till the season starts