[RC-Monster Mike]

True, and I use the described technique frequently, but there is always a trade-off. The round corner is simply relocated, as it can't be avoided. Cutting into the walls of the tray, particularly at the corners, drastically reduces strength where it is needed most. The trays for this chassis are quite long, so I don't anticipate fitment issues for the vast majority.

The current chassis components, transmission and layout will be incorporated in the design - no intention to make a "new" chassis for the old truck(though having backwards compatibility would be easy enough).