c. XX-184 - new non-proportional receiver board
d. XX-318R - old D12 receiver board
e. XX-339R - new D12 receiver board
f. XX-363T - D12 Remote board
g. XX-412R - new proportional receiver for B & C series RTR. Release Year 2022.
h. XX-532R - new board introduced in the new gen C54-1 RTR. Compatible with old WPL remote
i. XX-652R - used on the C14 & C24 RTR from March 2023