I'm building a frame for a display booth (7.5' tall and three sections 9' long made up of 3 - 3' x 7.7' sections hinged together - think really big face frames). I'm milling poplar into 3/4 x 2 1/2 for the frames and everything will be joined with pocket screws.
Question - Poplar, although technically a hard wood, is relatively soft. Should I use the fine thread screws intended for hardwoods, or go with the coarse thread screws normally used on pine, etc.?