Hello. We've recently purchased a used GE profile harmony washer and dryer set. Going to do laundry today, I realized why we got so cheap...2 of the lifters are missing in the dryer -_- I called for parts and thankfully they are replacable, so I guess the real Question here is: how easy are they to install? without actually seeing the part itself, it looks like they just pop in, but wanted to ask first before ordering and then have to pay for a tech to come out.

thanks in advance :)