Here are a couple of reworked SMLE's that I have. The top is a 1925 Lithgow that I made into a semi Lee Speed. .303 caliber with a Bishop stock. I cut the magazine to 5 rounds and added a front ramp and peep rear sight. I am not sure what sight would be correct but the peep works very well. I removed the charging clip and welded up the holes. I left the cutoff intact.
The bottom is a 45-70 I made up a couple of years ago for a pig gun but as yet it is not blooded.
I like the SMLE's the action is smooth and really very simple to work on. The brits had it right when they developed this action. I can see why it has stuck around for so long.