hi,Ed. I just assembled my f104pro this afternoon.
I found that the regular battery is too wide for this car.
What modification did you make to fit the rectangular lipo ??
AI showed me a trick.
I use all four battery post, then cut the inside part of the ESC and receiver brackets. Use servo tape to fix to battery. I use some scrap piece to stop battery moving.
A little late, but how I put the battery in.
to take out, undo 2 bolt and two top deck screw.Using heavy pivot post, so use spacers to not lose the screws! (3rd picture - 3x3mm + 1x2.5mm + Nut)