Syringes can be purchased anywhere such as WalMart , CVS, Walgreen, Rite-aid,Wildmans. Some places they are out to grab, others ya must ask at counter. Tractor Supply & farm supply houses have them too. Some of the holes are tiny[on some syringes] and you must cut tip back, to make it a bit larger.[at an angle] The easiest to find for me, were the ones used to give kids liquid medicine. Ya don't want the ones for real needles.
I use a bit of chopped carbon fiber, you can get it many places.[mine came from Wildmans,5-6bucks is a lifetime supply] use chopped Kevlar, milled fiberglass also. If you don't have any, don't worry a rocket this size is just fine without.
Need 5ml of glue for each fin. 4 fins each set = 20ml. Guess what, that's exactly 1 pump using West pumps!
So 1 pump of West resin & 1 pump of hardener. If ya don't have the pumps, mixing cups are labeled on the side.
Mix resin & hardener first....then add in chopped fibers...in this case size of dime.
Mix thoroughly to break them up . About a minute total mixing in each direction, back & forth.
DON"T make the rookie mistake of thinking more is better....it is NOT. You will end up with a hairball that won't suck up the syringe & won't inject. Trust me on this one!
Suck up 10 ml into syringe, mine are so old [at least 5yrs] I had to re-label, I clean & re-use, over & over.
Gotta go do some Xmas shopping....be back to finish later.