Or one has to ask themselves do they need a sight that will give them 100YDS...other than for this challange and the odd play day...
Would you realistically hunt with a 100 yd pin...or even shoot 3D...other than some fun or a long distance 3D event ...the high majority of shots will be well in your sight pin range
A fixed pin sight can be played with where it only takes seconds to have a dead on 100 yd pin also...
My pins have an 80 yd on one bow...set up correctly most will have lots of room on the sight elevation rail to move entire sight down...mark normal setting where 20 30-40 50yd etc sits and adjust so furthest pin is dead on at 100 and mark that distance on elevation rail...so it can be simply set to 100 yard at ease...
A simple allan key is all thats need to make a two second adjustment...and is just an alternative to buying another large expensive sight for less than 1% of shots you will be ever [or maybe even should ever] be taking...
Neil