Review: VIRPIL VPC Rudder Pedals - Damper Upgrade Kit
VIRPIL is one of those companies that has always been very open to the helicopter community and started not only manufacturing products for the virtual helicopter pilot but also providing ways to make their products helicopter-friendly.
Pro Flight Trainer planning on an upgrading path for the 4th generation PUMA
The company is still looking into how this can be done but it looks like upgrading your previous-gen PUMA may be possible.
