Nice looking planes. Come to think of it, I have a set of Bellanca plans. If I remember correctly there are two versions shown on the plan. It's on my very long to-do list.
What engine are you going to put in it? Those Pet .09's are nice. I've had a few along the way, starting with the original two headbolt versions. I think they retailed for $4.95. Interesting way to design a baffle. Has a step down on the transfer port side of the piston. The only ones I own now are a Pet-II that is only one step above junk, and two (or three) of the last version, in excellent condition.
Of course, if you want to maintain Walt's flavor you might go for a Cub .09 or a Cub .14.
Can't wait to see it finished.
George