H&k vp9l dpm spring - DPM Heckler & Koch VP-40 & SFP-40 Mechanical Recoil Reduction System

I consider myself a novice / intermediate shooter. Running the VP9L prior to the recoil spring installation was a great gun to shoot. Recoil wasn’t bad and follow up shots took a bit longer to get back on target but overall is a great gun to shoot. After the DPM installation, I noticed I was able to get follow up shots down range a bit quicker and was able to get my green dot on target a bit easier. I’m no PewView shooter who can dump 15rds on a target in rapid succession with barely any visible recoil, but I was able to fire at least 1 round every 1-2 seconds at a distance of about 25yards which beats my previous time with the OEM recoil spring at the same distance as I had to readjust my line of sight after each shot with the OEM spring. I will note that I do have suppressor height sights which sort of impede my view with my green dot and thus slowed me down a bit more for follow up shots. Just something to note for anyone in a similar situation as me. I will note, it’s a b’tch and a half to install but it’s nothing to warrant a negative review, it’s just a tough spring to install haha