i just did a similar modification detailed in a recent post (Recent A-Frame Mods
the aluminum cones for the base are very inexpensive so it shouldnt be too much to get the CFO's approval, you probably won't even need to go out to bid or obtain a P.O. from the purchasing dept.
There is a center angle iron under the floor that kept me from securing through all 6 base holes, but with 4 secured the table is pretty stable so far.
I'd leave your other base in place unless it would be a nuisance or you'd be tripping over it all the time. gives you some options that way and avoids the extra holes.
If you check out my post, rather than reusing an existing table I fabricated a new top out of birch plywood, cut the table to the size i wanted and added an extra piece for when the table is in the down mode. Probably the mod i am mosthappy with so far.