Ya, I didn't realize that it would change the rarity, especially for one's that just change the appearance of the card. Do you know if the TOTS Retro 18, 19 & 20 are chemistry compatible with other TOTS? If not, they're a detriment to your squad that cost 50k coins!
SportsNutNomad sorry for the late reply. Those retro upgrades give your players TOTS chemistry. Just yesterday I had a mostly TOTS squad and my strike force evolution player was on 1 chemistry, and the full squad was on 31. I applied the TOTS retro 20 and now I have 33 chemistry, so I'm sure that it works.
All the best to you!
