When it comes down to it... im a cheapskate... could be a symptom of marriage

Has anyone done this mod before? Ive read a couple of things with positive results.

DIY: Solid Trans Mount 20$

if its tl;dr the jist of it is you take your standard tranny mount, pump it full of sikaflex (or similar) let it cure and reinstall, and supposedly stiffens the mount up similar to a bought one

I guess on top of that, is there any disadvantage to installing a more solid transmission mount and leaving stock engine mounts in?