Careful what you say ... it can happen when you least expect it.
And fwiw, you may be fine at 20-30-50 mile distances, often times chafing doesn't make itself known until you get to century-plus distances, which is what the OP was asking about.
Yeah I rarely use it under 100 miles.
Sarah
When it's easy, ride hard; when it's hard, ride easy.
2011 Volagi Liscio
2010 Pegoretti Love #3 "Manovelo"
2011 Mercian Vincitore Special
2003 Eddy Merckx Team SC - stolen
2001 Colnago Ovalmaster Stars and Stripes