Quick sanity check please. Been here for the months on a 2 + 1 tourist visa. Arrived by air into Chiang Mai. Plans have changed and we would like another 50 days here. In thinking just head to Mai Sai and land cross, then back for the first month VOA, then extend at immigration by another month. Does this sound sensible. (no land crossings done at all in the past 24 months). Thanks.