Unless your orthotics are made for cycling shoes and address some problem in the forefoot, they are probably worthless - most have a heel cup that is far too thick to use with cycling shoes. Walking and cycling are entirely different activities. I've worn custom orthotics for my walking shoes for over 25 years to address tendon problems in the arch, but they serve no purpose for cycling. I wore stock Sidi shoes for many years and only recently tried custom D2 shoes that include a custom orthotic. They are fine shoes, but very expensive.