@Stuper yeah you should be fine, even if you switch speeds the IPv6 should remain as it's hard coded to the account regardless of which broadband product you have. The only time I've seen an account lose it was when they changed broadband firewall settings because the 2 are currently stored in the same database table and it accidentally got overwritten but was easy to put back (it's just inserting a pair of numbers into the table).
Dave Tomlinson
Enterprise Architect - Network & OSS
Plusnet Technology
