The "clown board" was made for more of a pocket surfing style, in more powerfull waves than prk, fast bottom turns & going vertical into a reo or whatever, but still retaining positive drive & track with the confidence to snap into turns without the single fin pop out.
Interesting to note that the total 4 fin area is 20% or so more than the large 12" single fins I had been using, so it paddles quite fast & straight.
The main difference I found is the ability of the small multi fins not to over power or pop out in fast snap turns, they slip a bit, "depowering" allowing the board to be kept under you & not being thrust forward as a large single fin can do.
Nose riding I thought may be a bit side slippy with the comparatively short quad fins, but to my surprise they tracked very high & fast with confidence.
The quad positions came off the McKee site, he seems to know his stuff!
Clown board was surfed for 5 hours today in Bells, Rincon & Center's in knee high to the odd shoulder high clean off shore.