Tantan also has the r12 but under the x12 name instead, its cheaper from dengfu. Ive had decent to moderately poor experience with their frames but i could just be unlucky. The fm098 after i fixed the creaking due to the seatpost has been fine. the r12 has just been a nightmare from start to finish for me so i cant attest to that. thw fm098 is insanely stiff. my r12 is insanely comfortable. i dont know if its due to my farsport wheels or the carbon layup.
if you want to get a custom paint job, its like $100, the poor english led to me not getting the decals i wanted on it, but thats poor communication all together.
edit: as of right now, i would not recommend the r12. likewise with the x12 as theyre the same frame. i am very limited on my options because i need a 61. the closest 58's i could find have a -10 reach and other stuff, so i'd need to buy a bike fit along with one of those frames.
for both of our sakes im researching 61 cm full internal routing frames or at least ones with geometry like it. the r12 from dengfu and tantan (same frame) are the only ones i can find atm.
edit: day after. went for a quick ride and down a 2% i was slightly wobbly but nothing that scared me at 28 mph. Also fixed the creaking/crackling sound by just adding grease, it wasnt a creak though so it did concern me at first but i did fix it. im going to swap wheels with box ones when i get the chance and see wtf happens.