RE: BT Bf109E-4
pic 1-2: began cutting up the cowl openings. BT recommends enlarging the "oil discharge opening" in the front of the cowl if the engine is to be totally enclosed so i did. Holman provides a second chin section of cowling that can be bolted in place allowing access to the engine (area that is marked in pen). i didn't want to cut any more of the cowl and all i really wanted was access to the glow plug which the front opening gives me so i'm not going that route.
pic 2-5: air intake for the oil cooler. i'm using 1/8" balsa to make intake walls and screen support. sorry for the blurry pic. 1/32" ply piece for the intake guide vane friction fit in place. this needs to be removed to add the screen to the rear balsa piece which needs to be added after painting. i still need to add some microballoons to the front edge where the balsa meets the cowl and feather in.