About to make a BT with my barclay card

Enviomon2

What should I look out for,

I really would like the terms of the BT in writing but barclays havn't realy given me any decent mterial on this.

Here is how I think it will work.

I intend to  borrow £500@2.9% as a balance transfer from my overdraft.

I will be charged a 2% fee to transfer it over so = £10

so the total interest I will pay on this amount is £14.5 per year however as I'll also have to py back at least 2% the outstanding balance each month the amount in interest in £s each month will change.

My problem is that I intend to set up a direct debit to off this debt and the interest. The trouble is, as the amount is going to change as I pay it off, I will then have to pay smaller amounts to meet the 2% paid back per month requirement of the loan.

Can I set up a direct debit like this, of course not only will the minimum amount necessary to pay each month change so wil the interest. To give you an example of what I mean

first payment is on £500 so I pay 2% of this £10 + the interest 0.24% ie £1.20  = £11.20

however once I reach £400 I should only have to pay £8 back each month and now the amount/£ in interest is lower too @96p

Given this, how should I go about paying this debt off, how about just reviewing the amount I'm paying back on direct debit every couple of months?