1 original tial wg 38mm selling 990 completely new
1 thai trust wg 35mm selling 350 looks like old
personally used thai boost at .9 bar, 2 weeks diaphram kong, to replace 180 not including installation.
let say a 1st i buy a thai at 350, 2 weeks kong spend another 180, and 2 months kong spend another 180 and then 6 months kong another 180.
total will be 350+180+180+180=890 not including installation charges.
might as well i buy tial 990 one time no hassle.