Nice work!
I too added a hatch but it was strictly for the plug wire.
Thanks, by the way, for sending the MAS 15 x 7 3-blade to Tru-Turn for profiling... I ordered one for the Biela props pictured above. However, they ship to Canada at a flat rate ($30.00!) so I mitigated that by also ordering a 2-1/2" spinner profiled for the MAS prop - I use the same one on my DLE 20 and have had a plastic spinner up to now.