Airsoft Canada - CA G36 Semi Auto Problem

Okay, here's the story. I was given a G36 that had a few problems, the biggest being....well it didn't fire. Apparently this guy wants the gun to actually fire bbs. Go figure. So I took the gun appart. Fixed what was wrong. Put the gun back together.

I then test fired it without a mag. This is what it did.

On semi auto: one pull of the trigger = one shot. Good.

On full auto: one pull of the trigger and hold = a whole bunch of shots. Good.

On safe: ......well nothing happens. Good.

Then with a mag but unloaded.

On semi auto: one pull of the trigger = one shot. Good.

On full auto: one pull of the trigger and hold = a whole bunch of shots. Good.

On safe: ......still nothing happens. Good

Then with a full mag.

On semi auto: one pull of the trigger = two shots. ....uh?

On full auto: one pull of the trigger and hold = a whole bunch of shots. Good.

On safe: ......again nothing happens. Good

Back to semi auto: one pull of the trigger = two shots. ....hmmm?

Well this seemed a little odd. The gun works perfectly fine. Unless you put bbs in it. This was very odd indeed. After more test firing I found that as I increased the hop up, the 2 roand burst went to 3 round. A little more hop and it goes to 4 round burst. A whole shitload of hop and you get full auto.

Now I tried to convince the owner that this is a very cool and rare feature that I worked very hard on to install. He didn't go for it. He still wants it to fire one bb at a time when it's set at semi.

Anyone got any ideas on how to get rid of this really cool feature?