wait there....

[Dazza]

... i didn't know you could get hydroiodic acid by reacting iodine with phosphoric acid!, but according to this document u can-

https://www.thevespiary.org/rhodium/Rhodium/chemistry/mmda.txt

cuz phosphoric acid is alot more available that red phosphorus!

[Rhodium]

Read again. The document proposes to generate HI and phosphoric acid from iodine and red P, so your assumption is way off.

[Dazza]

oh... damn
well i went back and reread it and it still looks like it says that you can do it that way-

"For this you will need to generate HI. You can do this either by dripping
dH2O onto RP/I2, or phosphoric acid onto I2."

[Rhodium]

OK, then the error is in the main text. You can make 57% HI by distilling a mixture of dilute phosphoric acid and KI or NaI.