Also, is there any meaningful difference between the R13 and the polyfil?
I mean the polyfil just sorta gets stuffed in there and the R13 lines the walls... I don't really like working with R13 in the house... but if you feel it's essential I'll grab some this week and try it out.
Also, as a tangent... any thoughts on playing with the crossover a little in terms of fine-tuning? I have parts on hand to try a "solen split" 1st order... I feel like most of the bright energy is focused in this x-over region.
In any case, I'll try the port first... then the stuffing... and report back.