The fins look quite similar to the 1/4” plywood fins on my L1 Apogee Zephyr.The biggest challenge was deciding how to bevel the fins. The fins are 5 layer 1/4" plywood.
I got my L1 with the Super DX3 last fall. Perfect flight on a H219T. I didn't setup an ebay, just used it as a part of the airframe. I put the main in the sustainer and did motor ejection. For my L2 I don't really need an e-bay either. There are L2 folks in my club that did motor ejection and a JLCR. The DX3 will fly to about 4,000 feet on a baby J. The airframe is fairly balanced between the payload and sustainer, meaning you can go drougeless with a JCLR or you can put a small drouge on the sustainer with the main. I plan on messing with the e-bay and dual deploy after I get my L2 as prep for a (maybe) someday L3 attempt.