I highly recommend NOT using VDO senders. I've had to replace a fuel pressure sender after 200 hrs on my 9A and 100 hrs on my Rocket. I disassembled one and found that the wiper tends to wear the resistance coil in one spot (presumably the steady state pressure). It then gets stuck.
I just replaced both my oil and fuel pressure senders with the Kavlico equivalents. Expecting the Kavlico sensors, I had prewired the 5 Volt bias supply when I built the Rocket, so it was pretty straightforward to convert. Hopefully these will be more reliable.
My only real gripe was that Spruce sent me the old VDO sensors in the EMS sensor kit AFTER Dynon announced the Kavlico ones. I was surprised to receive the old stock, but I had a bigger problem with the old non-functional servos they sent, so I didn't raise a stink with the sensors.
V