Barth 1/3 YMF Unknown Parts Old Kit

Anyone...

Attached photo shows parts I have not found on plans yet. They look like counterweights. Package called Beutel nr. 12 Anyone know what they are?

Next question on servos. I was going to mount elevator servos in turtle deck (baggage door area) and run arrow shafts back to elevator. For rudder, the plan was to mount servo in same general area and use cables for rudder and TW. I have on hand a number of both FMA S500 and Hitec HS 805 BB. Hitec is analog. Believe FMA same. Both put out over 300 oz-in at 6V. Anyone know recommended servo torques for all servos for ths plane??

Engine not picked out yet, but likely a 150 twin (love a radial but too expensive). Is the Waco nose heavy with a 150 and should I be thinking of moving servos more to rear?

Thanks,

Mike Hopkins
Waco Brotherhood # 132