The old kick drum design with a single leg didn't work out so great.  Half way through every song the whole assembly would move further and further back when paying. The leg I used before had an extension for height adjustment however the clamp that was used to lock it once extended didn't hold up causing the assembly to wobble back and forth thus moving it back.  The other issue I had was after fixing the clamp the assembly would turn when played.  Being frustrated I had to come up with a fix for this.  I copied off of rolands design and plan on putting two legs at each side on the bar 
My harness system uses velcro straps that are help in by sandwiching it between the head and shell. The straps seem to touch the head a little enough to possibly effect the head vibrations.  To fix this I've come up with little brackets that are being made now. They are little pieces of lexan shaped to the radius of the shell with a hole in them for the strap to go through.  These mount inside the shell to the lug screws and have a little double stick tape on them to prevent them from moving up and down.  By using these the straps no longer touch the head thus eliminating the muffle. 
I combined two different trigger systems here  -- the harness and the spider assembly.  This gives a near perfect isolation between the head and the rim trigger.  Looks pretty cool with the white head on it.