exactly it is my opinion and those $20 can be spent on standard vise that will do much better job and not just for soldering so you dont end up with a million of single purpose stuff
Radek
V4 D8 - RX8, XERUN 4168SD
F1-09 - Tekin RS Pro, 17.5t Redline, 2S LiPo
Sakura Zero S - LRP, Saturn 20T, 2S LiPo
*EX-10 Eurus*