Equity drawdown in its simplest form - what would you do?

Pulling some equity and so looking for your wise advices. So much thanks in advance

Loan A - property 1: P&I OO
Loan B - property 1: P&I OO equity drawndown from propery 1 to deposit for property 2
Loan C - property 2: P&I INV

Currently all interest are claimed as deduction for both places are rented out. As I am looking to extract equity from property 1 once again for car repayment (30%) and remaining (70%) parked in offset, I am a bit puzzled with the structure

If I couldn’t get a fourth split (<200k split attracts higher rate) how best to go about drawing this down to:
A. Keep the rate minimal (by having >200k loan, and retain OO status)
B. Keep the tax deductibility status clean

What I could think of is to top up loan A and create a interest tracker (might get unecessarily complex given offset and car payment) to apportion the nondeductible bit. But something does not feel right. Is A going to be “contaminated”? What would you do! I am sure the solution will be so simple but my puzzled mind just refusing to see it

 

Which lender? Why can't you get an additional split?

 

I would refinance

 

Change lenders and get one that allows more than 3 loan splits, simple.