This is probably a bad idea from the get go.
There is only one possibility I can see to fix this disaster.
If and this is a big IF... The frame is really stout on this TT. Then see what it would take to move the axles towards the rear. And while you are at it, install new heavier duty axles.
If the frame isn't strong enough, you could build a frame under the existing frame. And then do the axle upgrade/relocation.
Things can always be fixed. With enough money and determination, you can pull this off...
The big question is... Do you want to bad enough to do what it will take?
And oh yeah.... Fire that engineer.