Stringer install technique

masking tape located on the stringer at both sides of each joint indicates where 

to sand the epoxy coating on the stringer for better adhesion

- each sanded area on the stringer was first coated with clear epoxy

- and clear epoxy was applied in the notches to promote adhesion

- much of the wood in the notches is end grain
- they should be first saturated before filler is applied or a dry joint could result

then epoxy with wood filler (peanut butter consistency) was generously applied to each notch

- the stringer was inserted into the notches and held in place with temporary screws used as wedges
- the spatula was used to work any gaps in the notch full of epoxy filler
- fillets were made where the stringer meets the frame
- removing the masking tape made for easy cleanup near the fillet