Waffa were nice enough to send me an e-mail about the PTSS. I'm not sure what advantages it would have over a PTJ though, apart from the wipe-clean back panel (oooh errr missus).
@Brommers started
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Waffa were nice enough to send me an e-mail about the PTSS. I'm not sure what advantages it would have over a PTJ though, apart from the wipe-clean back panel (oooh errr missus).