Howdy Lee, Good to see you again. You asked why I have so many 450's. Well, I bought the EXI 450 first and it was heavy, my first build, really cheap, and plastic, then came the Trex 450 SE from ebay for about $100 it was too good to pass up, then the Trex 450 Pro $300 on ebay to good to pass up, and then the HK450 Pro well I wanted to compare the Trex450 to the HK450. I love them all they are my Bebeies. lol