On my .325 pitch full chisel chains I have always used a 10-degree down angle and a 35-degree side angle when filing with a clamp on file guide. I just bought a used 372XP with a 73LG full chisel chain (3/8 pitch by.058 gauge) and cannot find information on how to file this chain. I also need to know if a .025 raker guide is the right one for the 73LG. I cut softwood almost exclusively, so I would also like to know if when I replace this chain should I get the same chain or a different spec.? Would someone please advise me? Thank you.