I've seen many rigs with small rubber end caps covering the ends of the 15mm rods on the landing gear. Would someone mind posting a link to what you purchased? I'm finding plenty of options, but nothing specifically for this purpose and don't want to waste money with trial and error. Thanks in advance!
Just in case anyone was wondering, I found these caps to fit perfectly: https://www.amazon.com/gp/product/B07V2LKPQ4/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1