I am new to this so some basic issues I am sure,, I am building Amati Vanguard (first real build) and so far getting by okay. But I built the mast and now need to get holes drilled in the upper battletop for lines to go through. I tried and split a few already, had extra parts so was able to reconstruct the battletop, but now afraid of splitting these. Any thoughts on how to drill these holes? I have been using a fine twist bit.