The solarforce SMO reflectors do produce a slight donut in the hotspot. The donut can be reduced substantially by carefully focusing the pill with the reflector. Here are some pixs to show you.
In these first pics take a close look at the emitter PCB (green) and the hole/lip of the reflector opening. In the first picture (XP-G #1) the emitter pcb and the lip are almost level with each other. In the second picture (XP-G #2) the emitter pcb is slightly below the lip opening.
Here are some beamshots of the two compared. The distance from the wall is approximately 1 meter with XP-G #1 on the left and XP-G #2 on the right.
The donut hole in #2 is still there. However it is MUCH better compared to #1.
If you want to completely eliminate a donut hole you can use a OP reflector such as KD SKU #S008317. Note that it will reduce the amount of throw.