Hey Sean, nice joiner!
I have a saw called a japan pull by Tajima
Its the best saw Ive ever used, and cuts on the pulling action. Its unbelievably accurate and cuts easily through hard wood and thick carbon skins for aileron gaps etc. I reckon it would cut through the joiner pretty accurately. I got it off someone for free so dont know where to get one or how much, but it is great!
Also I have a bosch reciprocating cutter (like the renovator of TV) and it would have to be my equal top used tool, along with the dremel. It might not be good to cut your joiner with but its great for cutting out aileron gaps and even good for scoring the hinge lines, as it doesnt cut the kevlar very easily. It will make cutting out your thick carbon surfaces a bit easier than a stanley knife!
Keep it up mate!