Re: 6620 turbo header
try to find a 900 series platform if you can, we ran an old 220 platform on our 9600 two years ago since we rented some old nursery ground and we didnt wanna chance ruining our 925 platform on it.
The reel fell off and went into the feenderhouse (disaster), the height controls never worked, and it seemed like parts were harder to find with them, and for sure working on them was a pain in the ***.
Try to find a nice a 918 or 920 flex...they can had for about $4,000-$8,000 depending on condition, and would keep a 6620 running good.