nolage is right, you shouldn't lock the base and column together or you'll lose the ability to tram and square the machine.
However, there is one thing you could do that is very close. Create a very small gap between column and base. No more than 1/2" or maybe 1". Needs to be small enough that in height vs width, it is solid because E/G is not as strong as cast iron, though it dampens better.
Now tram the mill in. Make sure it is leveled first as that really affects tram. Once trammed, tape the gap and inject your resin. Ideally you want the base to have a flat resin area that you apply a release agent to so the column won't bind to that area. You're seeking to create a large surface area, very flat, in-tram, connection between these two. If all goes well, you can bolt down that column and as long as the machine stays level, it will be in tram.
I've seen this method described for use fabricating one off machines. They would typically use Turcite or similar, but the resin will work.
Consider it a total experiment though. No guarantees it'll work out well!
BTW, I think you'll like the E/G fill. I estimate it added about 20% to the vibration dampening and overall stiffness of my IH mill when I did it. You can see my pages about that over on CNC Machinists Cookbook: Software and Information.
Best,
BW
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