Help!!! on a frankenstein plane

i had built this plane from a few different pieces, the fuselage was a sky fly max and the wings were an apprentice with the tail being built partially from the original tail and boom. turns out the tail was warped and to flimsy so it had to come off. i was thinking of replacing it with just a large rear vertical fin and just use elevons and fly it like a big wing. i have seen the flying planks and wondered if this wind be comparable or not and if it will be stable enough to fly. i also have these little wingless i made i don't know if they will help or hurt it but was just a thought, plus they make it look even cooler. any advice or suggestions would be greatly appreciated.

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