Got a 1920 30 Luger DWM Commercial (Alphabet Luger) in the other day. I found the spring tension to be pretty weak so I will be referring my client to send it to you when I am done with it. I know how important a strong magazine spring is to functioning, preventing failures to feed etc. Thanks for all you do for us GT, your work is IMPECCABLE! Those aluminum and wood bottoms youe make are so historically accurate too! I wish you would post pictures of all the different types you have made or repaired original types. Very impressive. Your work is in a class by itself.