I have an old Mauser (1918) that I a doing some work on. It has been sporterized already(not by me; was that way when my dad bought it) I am looking to put a Timney trigger on it with a safety. I am asuming there will have to be a bit of stock work put into it for the safety. I also ordered a Mauser bolt shroud from Brownells. Do I have this figured right? Will this work out? I plan on taking it to a gunsmith to get the work done. Is there anything else I need to get for a trigger replacement? Any other advice about Mausers? I am very new to them.