I am in the process of restoring an old MK Joker and have two questions:

1. Should I use retracts / how much will not having them negatively affect the flight performance? I am worried about weight (extra servo + linkages) since I've had to make some repairs. I have painstakingly kept all repairs as light and strong as possible, but as you know It's almost impossible to not have any weight gain.

2. The wooden engine mount has mounting holes 25mm (1" ) Center-to-Center Front-to-Rear and 2mm (2.05" ) Center-to-Center Side-to-Side. Any ideas on what engine was originally mounted (Webra .60?)? I will have to find an engine with equivalent mount dimensions since the mount is wood and permanently part of the nose structure.

She's really starting to look pretty again and I want to do her justice.

Thanks!