Okay, here is a picture of a top deck that I am borrowing from a friend (Laurie). He built this from 3mm graphite. And he said he won't do it again!
haha... At least he let me borrow it til the Snowbirds is over with... Anyway's it's just to give some of yall an idea. He used old standoffs and ground them down to the right height. You could use the MSX steering posts as the stand offs if you have any laying around. This top deck helps in taking out alot of flex.