I used the stock expansion chamber that came with the Spyder TL Plus, but it really was usless considering it was a two stage expansion chamber and was defective, so I sent that piece of crap Spyder back!
Tippmann Model 98 Custom, ACI Four Stage Expansion Chamber, Psycho Ballistic drop forward, 12 Volt Revy with X-Board.
This product worked very well this past week when I played in temperatures below 25 degrees. My gun functioned properly most of the day, but with CO2 in those temperatures everyone I played with had problems. I was the only one who didn't have a problem besides broken paint. This expansion chamber is very unique in the way it's designed, and because of this, I feel that it is superior in it's field. Installation was very easy, because it was all self explanitory. You must have an IQ of about .9, no .1, to not know how to losen the screw in the bottom of the chamber and twist the outside of the chamber around to put the hose where you want it. I also found that it is very compact which allows it to be used on some markers where the ACI 6 Stage Expansion Chamber cannot be used.
The position of the hose is in the middle, and not in the bottom, but since you can just twist the outside of the chamber, you can put the hose in a comfortable spot. All in all, this expansion chamber does not have anything bad about it.
This chamber is definately a top of the line product, and is probably one of the best made. I purchased this product because I wanted nothing but quality and reliability, and it gave that to me. I am not telling you to buy this product, I am just telling you that this product is nothing but high quality at a good price, and the choice is up to you. I hope you take this advice and buy only top of the line products from a company who manufactures the highest quality of products.