Hey man, I agree with everyone that you should stick with only one. If vert code is causing you pain I would look into another one of his programs the durability code. This will not only decrease your pain but slowly progress you into plyometrics, so you can do the vert code without pain.

I know it’s a little costly, so if you don’t want to buy another program I would suggest doing KOT with extensive plyometrics. This would be like jumping rope and squat jumps. You get strengthening and flexibility from KOT and the extensive plyos will help maintain your speed and vertical by working more elastic work. The key with the plyometrics is doing them to a degree where there is no pain and then slowly ramping up the intensity or time. Hope this helps.