Chuck,

No right angle drills needed. Just long drill bits ( 4 1/2 inches long ) made out of .020" music ( piano ) wire or larger. The music wire is sharpened via grinding at one end creating a point or flat surface to do the drilling. ( old woodwooding working trick ) Chuck the music wire bit in a variable speed Dremel and on the lowest speed possible drill the holes needed. I drill all holes for the train line with this type of homemade drill bit. SAFETY CAUTION --- You need to hold the music wire flat ( keep the wire bit straight ) when first starting the Dremel tool or the wire will bend at the collet and will spin in large circle causing possible damage to your hand or model.

Lester Breuer