Recently upgraded the $6.50 "Davida" MXDL 3W from Kai with a SSC U-bin, with fantastic results.
As you'll see on the runtime graphs below, overall output was nearly tripled with no effect on runtime (i.e. from the dark blue line to the pink line). Output is now within spitting distance of a P1DCE on medium (primary).
Results are with my home-made lightmeter and milk carton box. Relative output values are typically fairly close to the numbers from Quickbeam's FR.com.
Beam quality is excellent with unmoded reflector. Here's a representative beamshot:
MXDL-SSC is on the left, P1DCE is on the right (on hi), both on AW protected RCR
Full details on how I did the mod (with more beamshots, etc.) are available in the custom & modified section: