changing non mfi 911S cams into 911S MFI cams
 

Guys,
I am getting ready to put together a 2.4S motor with MFI. The only problem left before going ahead and putting it together is that I have a set of non mfi 911S cams and need a set of MFI 911S cams.
I spoke to a sales rep at Webcam today, and she advised that Webcam can simply weld on the extra drive so it will work for the MFI. Price is only $150 which is a lot cheaper than buying new ones. Has anyone done this? Is they any downside?

Welding works but why not just tap them and bolt on an extension?

It does need to be timed AFAIK, it may be worth it to just pay the guy. I wouldn't know where to set it?

Camgrinder may sell you a bung that bolts on to the end of your cam. you will need access to a lathe to machine a pocket and tap two holes. No timing of the bung is necessary, that is done with the pulleys. I have converted a couple of cams to mfi with no problems.

Don't have access to a lathe. Considering the amount $125-150), I would just assume let a seasoned cam specialist do the work. Thanks for the input.