I ordered a LockNLube Mar 16 after reading this thread. I bought it because of the comments in the LockNLube thread:
It arrived today and I tested it by greasing the recessed loader fittings on my DK35. At times it is next to impossible to get the gun off those fittings, even with a loosened coupler. The LockNLube works great and I'm glad I got it, even with the $7.95 shipping and Canadian $ exchange rate.
I'm sure I'll grease the fittings more often with the new coupler.
Thanks for the information.