Cutter rig upgrade

[vela42]

i have a 1993 42' catalina. the previous owner installed an inner stay (cutter rig) and all of the gear necessary. It has sailed to south america and back to san fran without worry but i do not know any details of the trip. My concern is the amount of load on the mast. the running backstays are 5:1 with cam cleats. I set that hard and i feel i get a ton of bend in the mast when flying the staysail in heavy winds. At the dock i can pull on the inner stay and create a lot of "pumping in the mast. This is the first boat i have owned with a inner stay so i do not know what is normal.

I actually want to remove this set up and add to my sail inventory before leaving to Mexico this October. The boat was not designed for this and i am not sure if the mast can take the loads in heavy conditions. Tto me it just feels like a ton of load in the middle of the mast trying to snap it in half??

any advise is greatly appreciated,
Chris