Barrel Pin placement question

[Nailcreek]

I'm working through a Jaeger "project" that I bought off of gunbroker about a year ago (that'll be its own thread at some point) and have a question for the group. 

I've the first barrel pin at 2 1/2" on center from the muzzle, the next at 18" and then the tang screw.  The barrel length is 27 1/2".  Should I put another lug in?

Thanks

[smallpatch]

Yes, three would be customary.
First 3” from muzzle, third midway between lock and entry pipe, (there abouts), third midway between those.

[Nailcreek]

Thanks much,  a third pin it is!

Yes, three would be customary.
First 3” from muzzle, third midway between lock and entry pipe, (there abouts), third midway between those.