Landing Gear:
I cut out part of the stock wire and lashed on CF rod to replace it. This provides more spring and lightened it by 3g. I also added a few degrees of toe-in. Typical Stearman hubcaps were cut from 0.010" thick aluminum sheet. Wheels are Hobby Lobby 2 1/16" foamies.

I made templates for installing the wings. I learned from an article in RC Micro that Leggos™ are useful for many things in modeling.
Using the templates that came with the model would have resulted in negative incidence of the upper wing. From what I have read, on biplanes with a positive stagger a positive incidence of the upper wing is desirable. I gave it 1/8" front to rear by adding an 1/8" spacer under the front of the balsa strip on top of the Leggo frame. After the picture was taken I flipped the balsa over, otherwise I would have had less than 1/8" difference.

Battery cover pin handle:
This is mounted in the front cockpit and is held and guided to the battery box by an aluminum tube glued to the fuselage. When black shows on the pin, the cover is unlocked.
The balsa battery box can be seen lower left. Balsa strut mount reinforcement at upper right.

I reinforced the landing gear bulkhead with CF tape. The final version has cooling slots carved out at the sides and bottom of the open rectangle. This was done after the bulkhead was installed in the plane when I realized there would be no airflow past it.

Slots and hole cut in motor holder to provide air flow.

Spanner holes cut in front gear. They angle in from the face where the prop is mounted in order to clear the prop hub and gear teeth.

Battery compartment cover:
The plane came with no cover. I thought that would be unsightly. The cover slips on from the back and the aluminum "Z" bent wire slips into a hole in the front of the battery box. The back is held by a wooden pin coming from the front cockpit and fitting into a CA soaked balsa block. The pin handle is shown in the photo to the left.

Tail: Showing pull/pull linkages and tailwheel epoxied to rudder for steering. Only the last right angle was glued. The long wire leading to the wheel was left free for shock absorption.