Personally I would stick to what is on this site and avoid you tube granted there are some well meaning people out there but this place is where the real knowledge base is for just about everything to do with milsurps weapons not just the Lee Enfield. Allot of the information contained on this site is from the hard won school of hard knocks by military trained armourers whom actually worked on these weapon systems like the Lee Enfield, Bren, Vickers, Garand & M1icon carbine, 50 & 30 browning MG's so on and so forth.
So take your time view and digest the threads with the info and if your stuck stop and ask here it may take a couple of days to get replies as people have other things in their life but they are all genuine in the help they give here for nought just to see the job progress to completion in the correct and accepted methods.