Vic,
No photos unfortunately as I have Penguins on two of my Micro RS4s and they have sufficient rear deck clearance for the BB300.
In essence you need to raise the upper rear deck by 4-5 millimetres (no idea what that is in inches - my el-cheapo "Mao Tse Tsung" Vernier Caliper only does Metric) You can raise the rear deck slightly longer screws and spacers.
I dont know if the alloy bulkhead will need working down at all..
The sweet spot for a Speed 300 seems to be about a 13T pinion, so you'll need to get the meshing right.
Hopefully someone will Post a photo showing the spacers in place
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