Reprap Wallace 2020 base frame

The RepRap Wallace was my first 3D printer and it has served me well for about 4 years now. It does tend to shake around quite a bit though and in this time some of the plastic parts have cracked. I noticed aswell that it isnt the most structurally stable of designs and it relies on the weight of the printer to keep itself from twisting.
I had a load of 2020 aluminium t-slot profile lying around so decided since i have to re-print some parts for it anyway i would try and stiffen it up a bit an