The numbers have improved since your last calculation, but it may still be based on a number of assumptions. I believe the 4% interest rate is going to be difficult to pull off. Not impossible, but unlikely unless you've already locked in a rate with a lender. Every percentage point will have significant implications. A 5% rate would add another $40k to your 30-year mortgage.
We are also assuming that your additional $40k rehab budget it going to create $50k in value. Again, not saying that this isn't the case but you'll want to be pretty darn sure before making that assumption. This leads to the potential domino effect of raising the rents from about $513.75 to $700, which is a huge jump (almost 40%). Your going to want to do a great deal of due diligence and confer with realtors, property managers and other trusted sources in the industry to confirm that the rehab investment will in fact lead to a return and that the going rate in the area for your type of unit can justify a $700 price tag, because if it doesn't, you're going to be in an even greater world of hurt than with your first calculation.
Lastly, some of your expenses shifted. Some for the better, others possibly not. Vacancy down, which your prior 6% could be borderline, let alone your new 4%. Some of that is made back with the capex and repairs, which hovers at a much more likely 8% now, so that's good. Insurance went down, which given the improvements you intend to make and increase in value, the insurance would naturally have to increase as well as it is now covering a more valuable property. Management down is unlikely as well as your prior 10% is more typical across the industry.
On paper, this deal looks much better than it did before, but it is also likely to be much riskier than before as the changes may be predicated on a numerous dangerous assumptions. Hopefully, some of these numbers are actual that you have received quotes for, such as with the insurance and property management. Otherwise, you could be digging yourself an even deeper hole by moving the goal posts in order to make a nonviable deal "work".
I'd still very much consider moving on from this property barring a significantly lower purchase price and/or the ability to increase rents as you've proposed, but you would have to be absolutely certain that it's feasible.