i been having tooth pain for a month now, heavnt got anything done to the stand yet. this pain just wont go away, but getting better slowly. the Dimensions for L is 2 inch shorter by putting 4 small leg in the middle as see in the pic, its cutting the L by 4 inch. so now 2 10's wont fit in the middle. so what i did was remove the small legs. but still the bottom wont fit 2 10"s. it will fit 1 10 and 1 5.5. the top Dimensions for W is only 12 not 13, 1inch short which make the 20 long poping out on the side about an inch only.
i tho i got this stand Dimensions all right but i guess i rush through it and mess up the Dimensions a bit.
if i lay a plywood on top making it 4inch(W) and 2inch(L) the 20 will fit.
i made the stand from using a hand SAW n with only a lilo brain on tool working i made 2 stand so far.