I'm received the version 2 of the Odyssea CFS 500 with the power cord coming out the lid - I also got the very light weight black ribbed hoses instead of the 1 inch I.D. green vinyl hoses. As you mod states the ends of the output/input tubes can be cut off and o-rings removed if using the vinyl hose(1" inner diameter??). Would/should I leave the o-rings on if I use the ribbed hoses (like the fx5 hoses) or would I be better off to buy 1" inner diameter hose (black vs. clear?).