Gearbox Mount

After quite some time pondering how to mount the gearbox to the chassis, this is what I came up with.
I'm not sure I'm altogether happy with it, but I can't think of a better way...
I started off tacking a 3mm plate into the base of the tranny tunnel, with an engine mount from a classic/original mini bolted to it:

At the rear of the gearbox are two threaded bolt holes (M10 I think).  I bolted a 3mm plate to these, and another 3mm plate to the mini mount, then with the gearbox supported where I wanted it, I tacked a couple of bits of 3mm plate into the gap.
I then unbolted it, added some sides, and fully welded it:

Here it is back in the chassis: