Nice gift for a friend, but why the blank back? Not anymore, added the logo to appear on both sides. I also removed all the extra filaments and re-labled everything so you can quickly change any of the colors in the object panel (pictures show Bambu PLA Red/White/Bambu Green) and each area can be a different color. Also created a different design for the keychain to attach. I usually go with a 3mm hole to accomodate various types of attachments so that was done here as well. Infill is set for 8% cross hatch which feels plenty strong enough for this. Printed on my X1 in about an hour including ironing time which you can also turn off.