Bill,

Most Sig kit instructions date from a time when you always got a complete "system" with TX, RX, servos, hardware and a radio tray. I'm sure revising them is on the new owner's "to-do" list. The trays usually were soft mounted to preserve the electronics of the day, mostly through-hole soldered that were prone to vibration damage.

You can make one from some plywood, or use 1/4" basswood as servo bearers. If you really want a tray, send me a PM and I'll mail you one.

The balsa pushrods work fine for what you're building. The only change I make to that design is to add some supports in the tail of the fuse so the 'rods can't flex. I'm not a big fan of the plastic pushrods, they have to be routed carefully to prevent flexing and can change length with temperature. FWIW, my 60 size Platt FW-190D9 has hard balsa pushrods....