Guarder SP120 upgrade kit for MP5

[BKHKMP5]

Hey guys, I'm quite new to airsoft guns so I need some help. I have an MP5 that I basically peiced together from lots of different places. I was shooting away happily with my CA V2 box and it jammed. I was never able to unjam the damn thing so I purchased a Guarder SP120 kit. A few questions.

1. Will my stock TM or CA box handle the upgraded parts?

2. I have 2 batteries, 8.4V 2000MAH and 9.6V 2000MAH, which do I use? The 9.6V actually doesn't fit in my MP5 rear stock properly, it sticks out about half a cm. What differences can I expect from the 2 batteries? I'd prefer to use the 8.4V if possible, because it fits in the stock. Guarder recommends a 9.6V 1700MAH +

3. I have a stock TM EG700 motor. Do I need to upgrade?

Any futher info would be greatly appreciated, thanks!

Also looking for someone to install this for me in the GTA area. I've taken gearboxes apart before, and sometimes they work, sometimes they don't. No more messing around, I want to get it right the first time.

Thanks,

Bryan

[ThunderCactus]

never a bad idea to upgrade to a reinforced gearbox. 9.6v is good if you have a strong spring to keep up your RoF.

[conrad13]

Where are you in the GTA? You should go to the Armoury and see Manchovie, good things come from there.

[BKHKMP5]

Originally Posted by conrad13

Where are you in the GTA? You should go to the Armoury and see Manchovie, good things come from there.

I'm in Richmond Hill. I talked to Illusion but he charges a bit more than I'm willing to pay.

Where is Manchovie?

Also, I still need more advice on batteries. Will 8.4's be ok?

Thanks,

Bry

[ThunderCactus]

8.4v large will do it, but your RoF will go down a bit

[BKHKMP5]

Do I need to upgrade the EG-700 motor? Also, I'm still looking for someone local to help me install and test these parts. I'm in the 404 and hwy 7 area in richmond hill.

Thanks,

Bryan