Ok after some research i have some different size for the Tube to use for the N-Filter. on Stefan plan the measurement is 2 3/4" some told my the N-Filter is 2 1/2" and i saw 3", what is your opinion?
I cant find any PVC tube 2 3/4 and 2 1/4 but they have a 3" one, that will finally measured like 3 3/8 OD, im a little confuse on what to use to build an accurate N-FIlter any idea???
I use 2.75" OD Acrylic tube. You can find it in 1 foot segments on ebay for pretty cheap.
Yeah, I just figured that the N-filter on Alkaline shell is too small (2 1/2") Another detail to bug me! And I was wondering why Bobamatt’s label didn’t fit. :roll:
Yeah man, you better just throw that pack out and start over. I can dispose of it for free if you like.
Mouahaha désoler ti-gars d’être la source d’un de tes autres mal de tête LOL!
So the official size 2 3/4??
Should be 3" OD.
Ill go that way, thx Cyland Props!
You should. Brent knows his stuff. 
Really? Oh man, that would be great. I don’t have a trashcan that big, it’s really problematic. 
Ok Fil the first of me or Vince that arrive at your home get your pack for free, deal?
I had the same problem finding the right size pvc. I decided to used a resin n filter. You can find them on ebay pretty cheap.
I went with 2.75".
I actually got 3" tube but proportionally, it wouldn’t fit between the lower cyclotron ring without hanging out too far past the spacer.
If I moved the rings up any more they would be behind the bumper.
So I cut and fit the tube to 2.75"
the n-filter is supposed to hang off the spacer a bit.
And the Hole in the Filter are 1/2" right, 9 hole of 1/2" each?
kind2311 from all the posts I’ve read of yours lately I know you’re the go-to guy for accuracy questions but all the builds I’ve seen have the outer-edge of the N-Filter flush with the spacer/cosmetic plating edge. Although, I came across an old-ish post by V71 in which he posted some pics of his master (built from the infamous screen-used pack) and the N-Filter does indeed hang off the edge a bit…
I too have acquired 3 inch OD PVC pipe for the N-Filter that’s why I was so interested.
So…3 Inch/hanging off the spacer is “acceptable”?.
From the So-cal GBs:
That’s exactly how my n-filter sits at 2.75.
If I had made it 3", it would sit like in the picture GeistKopf posted. Or push lights up behind bumper.
Might there be a loony number somewhere on the cyclotron/spacer measurements..?
So either it’s 2.75" and sits flush to the spacer or it’s 3" and the cyclotron’s a different size.
For myself i decided to do it 2.75, fit perfectly, prefer that to the ''offset" looking of the 3" one
I don’t think that a 1/4" can make any n-filter sit that far off. ( secret is that the bottom two “washers” are smaller than the upper two )