My dad has a large safe with a number dial and a 6 number combo. Not sure on brand but its a nice one. So recently he has had issues getting into his safe. No problem remembering combo think the issue is either the number of turns needed or the dashes are too small for him or the dial is going bad but it should never take 20 minutes to get into your own safe but it has for him. So here is my question. Can the number dial be replaced with a keypad or other means of access? Would like to get him something different as a surprise but dont know if I can pull that off.