With the newer style heat exchanger (3 inch diameter) installed on my m25 there is not enough clearance to remove the rigid transmission oil dipstick for checking fluid level. The heat exchanger has to be removed to get the dipstick out. So far the solution I have come up with is to take out the exchanger, then remove the rigid dipstick, cut off the rigid rod from the cap and make another flexible stick for checking the oil level. After reinstalling the heat exchanger I would simply use the flexible dipstick, without removing the exchanger, for monitering transmission oil level. Any suggestions or improvements to this idea would be appreciated.