Hi Henry,
Firstly i'd like to say CP 750 is a great choice and a wonderful plane.
I will try to give you the informations you need to know.I assum that you bought your plans in Canada, which are sold by S.Littner.
So, the Beryl can be motorized with o-320 (150-160 cv),o-360 (180 cv)and even with the io-360 (200 cv-some planes of this type are flying in Canada and US).
In the original plans, weights given are:
empty weight: 530 kg
Maximum weight: 840kg
in aerobatic use(+6;-3): 740 kg
Can you give us the different weights in your pack?We will compare and maybe change it.
I'll give you names of some Beryl owners soon.I can't say i am a owner of a Beryl CP 750 but my father have a Beryl CP703 (the one you can see on the top left of this page- F-PMEQ) , the little brother of the CP 750 one.
I hope the informations i gave will help you and if you have a slightest question, don't hesitate, ask us
