i got my tsx projectors and want to install them in my ebay projectors,when i opened them up this is what it look like

the middle pic is the actual "projector"i guess.the tsx projectors wont fit in their as is so i have two options
1)cut the housing to fit the projectors or
2)replace the ebay projector lenses with the tsx lenses.
but can i just witch the lenses out and they work fine,thats the question?