I figure that Larry has to be talking about AixiZ acrylic with the back still closed...
I didn't know anybody uses the AixiZ acrylic with the back still closed. Unless it is with a lower powered build or something maybe.
I remember when I first came to LPF, I read that if you don't open the back, that the plastic will begin to melt even with the Sony/Senkat reds at 250mAs'. So I never have used an AixiZ acrylic lens with out opening the back. All of my comparisons with other lenses vs AixiZ acrylic, are with the back opened. (as I have noted in my list of comparisons)
http://www.laserpointerforums.com/forums/YaBB.pl?num=1239845687/0
I think that people should make a note of whether they are talking about the back opened or not. Otherwise the information could be misleading.
Jay