M11X r1 motherboard & bottom base assembly

Hey;

I recently snagged a nice little m11x off ebay for a very good price (lucky cheap) and its in great condition.

I saw the R3 has a i7 with more powerful vid card. (compared to 1.3 core2duo on r1)

I see that the r1 has vga ports while the r2 & r3 dont.

I'm thinking of buying an R3 motherboard off ebay along with the base assembly.

the question is, if anyone here has done this, is there anything else that needs to be replaced? (keyboard, palm rest, bottom cover, screen connector, battery, sreen hinge)

If its just motherboard & base assembly , i can do. But if its more than, is it worth it?

Please give me your thoughts / opinions.