Tuning questions

About two weeks ago I started thinking about getting one of my replicas tuned. At this moment the MP5K and mG36 are full-stock (I mean the gearbox, not the body, bipod, battery and other stuff). AUG has the "silent" set installed, more info can be found in the post about the silenced AUG. But it does have significantly better muzzle velocity than stock replicas, I believe it's got something aroung 350 fps. (Mamut's CA870 after his tuning has 410 fps on 0,2g BBs and 380 fps on 0,3g -- meaning that the light BBs don't gain all the energy the power spring can give).

So I decided to put some money in my airsoft replica tuning.

Since MP5K cannot be used with battery larger than 1200mAh 9.6V (after small modification of some kind), I decided that MP5K will remain as it is now.

So the decision is to choose between tuning AUG and mG36. I wanted to get muzzle velocity around 420-430 fps. Tunned by ASGShop.pl both replicas are upgraded to this level by installing:

• M120 power spring
  
• super torque up gear set (Classic Army)
  
• reinforced bearing guide with bearing (Deep Fire)
  
• reinforced cylinder, cylinder and piston heads (the latter with bearing) and nozzle (Deep Fire).

Since AUG has already got both bearing guide, gear set and the bore-up cylinder set installed the tuning will eventually be only to put power spring inside. I have the Classic Army 170% power spring (I got it free of charge when buying G36) so it seems that this entire tuning will be for free (only the costs of installing all the parts...).

Later I decided that I will not put money in AUG. Why? I am afraid that the battery I have (8,4V 1200mAh) will not be enough to "fuel" this replica.

So I decided that I'll send my mG36 to ASGShop and order the 420-430 tuning. But instead ot all the reinforced cylinder-piston parts, I'll install the bore-up. It should cost similar amount of money but I believe I'll gain few more fps. Addiotionally I'll send them back the barrel I ordered and ask them to send me the one that'll fit (more about barrel troubles is written in mG36 phase III upgrade - day one.