we all gotta learn and start somewhere.i did exactly the same and destroyed a classic but,thats when i realsised that these things need rescuing a lot of the times.
i got my invaders here,just recieved it today.usa midway tabletop,i was wanting to convert to galaga but,seeing as it has a wgv1001 b/w monitor (like the first chassis wg had if i aint mistaken and a pretty rare chassis) i am going to restore this bad boy to its former glory.it got a board prob,garbled screen but,i will to sort something out,metal parts to shot blast and respray and cp's to sort out,just generaly a cosmetic uplift.even got the original glass top with the printed art on it,will try to save it and restore that also.
look out for my thread in the future.
try to get the board repaired and keep it invaders or see about having the pinout changed and have it so it will play galaxians/pacman,moon cresta etc.just try not to bin the boards,if you get the machine to play something else get the boards sold to someone for future.
other than that its your table top,do what you like but,try to keep the table intact with intact cp's or remove them, and replace with custom ones but,try not to butcher it.
