if you bet to 100% on your own tissue...what price

I am unclear as to whether you are seeking a personal strategy answer or a mathematical one.

Personal: each of us has our own opinion of “Value” which is very subjective. In theory, any price above the price in your tissue should be value to you. The problem is that it does not make it a winning bet.
Let us suppose you think the likely winner of a race is between trap 1 and trap 2. Your tissue says Tp.1 is 6/4, Tp.2 is 5/2. The market odds are 5/4 and 3/1. What do you do? How do you feel if Tp.1 wins unbacked?

Mathematically: a bookmaker prices up a race to 135% (or any % for that matter). If you then re-calculate those prices to a 100% book, should the resultant price for your selection be the minimum price you should bet at?

I specialise in soccer overs. It is purely mathematical and a two runner race. My tissue knows what the price should be, and how it changes with decay as the game progresses. My strategy is based on my perception of value at any particular time of the game.