My MFT3 sets on an auxiliary MFT surface that in turn, sets on my MFT cart. While I pegged the aux MFT surface to the cart, I never got around to securing the MFT3 to keep it from sliding, until today. A pair of simple retractable sliding door locks are now attached to the bottom T-slot of the MFT3 (which I never realized was there). Now my MFT3 is secured to the cart, yet it can be quickly and easily slid off by retracting the pin. It only took me 2 years to finally get this done.