I’ve finally purchased glues for the rocket.
I have West Systems 105, 206 and 403 filler for the external fillets.
I have J-B Weld Epoxy for the root fillets.
For the internal fillets, I’ll probably be using West Systems 105/205 (no filler). What I will need to get the epoxy up the rocket into the area of interest is a tube/syringe.
Yet to purchase the pipe.