What is the best way to do the red N- filter stripe?
My MMM sticker set doesn’t include that marking. I thought maybe automotive pinstripe tape would work.
What have you guys used?
Red pinstripe decal roll from a hobby or auto store.
Red electric tape from any hardware store. Just put 2 layers, you can kinda see through only one. 
That’s the method I went for, ensuring any overlap of the ends was placed on the underside of the Filter to be less noticeable.
I used some red Scotchlite (reflective tape) since I plan on being out on Halloween night. A little extra visibility doesn’t hurt.
Great ideas gents! I was wondering what to try for the n filter myself! Thank you!
I just painted mine on, but red pinstripe tape will be just as good if not better.
Yup automotive 3mm pin striping is what I used and was cheap
Picked up the suggested red electrical tape for my N-Filter - I thought it turned out very well:
(Please be nice, proportions are not correct on many things, used different parts (it’s my first build - and the shell is from DarkJedi)
You’re making a game pack, right? Me like it. 
Indeed! And thank you for the comment 
you might want to slice that tape in half at least… the stripe on the N - filter is not that thick, but every pack is different… still looks great.