that must be a old plane. it took a while but out of curosity i found a website for those jr models. also hobby lobby use to sell them... i think?. that one,"top diablo" was not even listed. they showed only one a jr model. a cap 232 showing a picture of servo installation in the wing. it looked like a 2"x 2" square cut out in one wing panel. i could be wrong but it looks as though that jr only made a very few models. sorry i cannot help more.