If your someone who just wants to do circuits then put in the DLE 20. If you want to do some barnstorming with the added weight of smoke then go for the 30.

I did notice I'm getting some wing separation on the top wing. Looks like it is not the glue joint but the sheeting right next to it. I do have a bad habit of carrying the plane with the top wing and looks like this needs to stop as I think this was the problem as the struts should help hold the wings together. No firewall additions for me, so far so good.

Mine flew like a brick till I added small washers to the back row of bolts to put in less incidence on the top wing. The forward wing needs to be the one to stall last and it would appear that it was stalling first. After the change it has been a totally different plane in slow flight.

Great looking plane.