S-41 mcpcb fit

International outdoors has the 4xp quad mcpcb with xpl-hi emitters for $19.Will this fit in a s-41?

The carlo optic for this is 24mm, so as wide as the S41

The spacing between the XPLs seem to be larger than on the S41

the Emisar D4 has a 24mm optic with 28mm head with this MCPCB

It gives a diameter of 21 mm for mcpcb. I know some people have sanded down carclo.

yeha but sanding down the Carlo cuts off light, so you likely end up with less output