If the system applies the rules, you will no doubt be successful. However, I've been through enough case laws to say that because you have that thing between your legs, you may actually not get a fair treatment.
I many case laws where the couple have shared custody (50/50), and where the mother has a higher salary, the CS paid to the father is sometimes half the difference between the table amounts - which is actually the fair way of calculation CS in a shared 50/50 custody arrangement. However, when the father makes more than the mother the courts / lawyers will simply use the full setoff. While we may agree that it is somewhat more expensive to raise children in two homes rather than one, this has not been proven. The fact is, just because it would (may) cost more to do so, it doesn't mean that the money is available.
Going back to the "half the difference amount", in your case (based on a 146k and 41k income) her contribution (as per the tables) is $2993/month and yours is $939/month. The sum of those two numbers is $3932/month. That is the total amount that both of you should contribute every month to raise your children. Since you have 50/50 shared custody, you should both take 50% of the pot, hence $1966/month each. Since your contribution is $939/month she would have to give you $1027/month. That leaves her with the same amount.
Now, if we were to agree that it cost 1.5 x the total amount to raise the children in two households then the total amount to the pot would increase to $5898/month (that's a lot of after tax money!). As your contribution would also have to be increased by the same factor (1.5 x), she would have to give you $1540.50/month.
Using the full setoff approach and adding 50% would have her give you twice that amount at $3081/month [(2993 - 939) x 1.5]. To demonstrate how ridiculous this approach is, this last number ($3081/month) is more than the full table amount ($2993/month) that she would have to pay you if you had full custody of the children!!!
JDaddy