Weight for A Class

Hi From down under
I have an older A class and wonder what the crew weights should be.
I realise this is essemtially a 1 man boat for racing but wonder about 2 up for social sailing.

I want to be able to take a friend sailing sitting / steering while I am on the wire.

We are both around 8okgs.

The mast is a Alloy Spunspar which is quite bendy
Any input welcomed.

Also would this type of boat rig combination take a gennaker
and if so are any rig modifications needed.

I have access to Carbon Fibre and or Kevlar tube but dont know which would be more suitable for Tiller cross bar
Boom

Also what wall thickness and diameter so I can sil with the confidence that it wont all fall apart

Regards to all

Ron Heydon
Go Gecko A Class Cat
New Zealand