Nobody has the equipment to test for bin and chinese makers tend to claim what they want. It doesn't cost any more to print q5 than q3 on the side of a tube.
There are a number of versions on ebay of the X2000 that includes both a battery cartridge and an extension ring to allow the use of both 3xAAA and 18650. Here's one of them:
The correct word is not weird, but sophisticated. If you use it on a bycicle, you probably want a zoom, which remains there where you set it, even if you drive on a bad road. So, the w901 has some adwantage there. Yes, if it is flow you want, modding it to R5 would be a good idea.
I tried with an OP reflector and it looks like a xmas toy. The 28mm lens also fell to the ground a few times and always some piece chipped off. Now it is almost "charming star effects 28mm glass lens for flashlight".
You can still paint the reflector in matte black to get rid of the artifacts of the OP reflector. But I guess this will not eliminate the "charming stars". LOL
Does the MXDL SA-28 still come with metal o-rings? I ordered a Tank007 TK-737 about a week ago because I think it has normal o-rings and it looks like it's made better than the SA-28, but it seems like most people like the SA-28 more. Also, I can't wait to read a decent review of one of those new EDI-T 18650 flood-to-throw flashlights.
If they were q5, driven at 1-1,2A regulated and hi/lo (wouldn't mind a 0,3Hz beacon mode) i would have already bought a dozen.
Another issue would be the lens diameter which i don't know how negatively would impact the flood and the loss of emitter side spill which doesen't get reflected out.