After I managed to blow the speakers in my SWR Super Redhead for the second time I decided to build a Jack 210. I used Arauco plywood from Lowes, Deltalite II 2510 speakers, and 16 1016 piezos. I wired the piezo array with a on/half on/off switch. I went back and forth on making it and "Airhead" but ended up making a separate matching 3 space rack. I routed holes for the handles and butterfly clips. It has tilt back casters and a extendable handle. I painted the inside of the cabinet and the rack purple and the rest is painted with 3 coats of Duratex. Took me about 3 weeks to build. The rack will be loaded with a Genz-Benz Streamliner 600 (as soon a I get the rack kit), a wireless and compressor. I only recently bought the SL600 and am still getting use to it. I was playing for the musical Footloose all last week and used a Stingray 5, SL600 and a Carvin 210 for most of the shows. I manged to get the Jack done in time to use it for the last two shows. I was very impressed with the sound. When I was using my Redhead I cut my lows and boosted the mids a bit. The SL600 is very bassy and a bit mid shy. With the Carvin I need to cut the lows and boost the mids a fair amount but with the Jack I can leave the eq fairly flat. So far I think the Jack sounds great. My volume seems to be very consistent over all my strings. In the past I have had to cut my lows to avoid over powering my high strings and to cut through. With the Jack I am finding I can have a lot of low end with out loosing clarity. I haven't had a chance to use it much yet. I play in a wedding band and a funk band and I have a lot of gigs coming up so I will report back after I have a little more experience with it. So far I'm loving it.