Why not apply for some of the sponsorships coming up in the next few months ? If you can pass them then it could be fair to say that you have the basic aptitude required to pass the ATPL training. You never know, you might even get sponsored !!
On the other hand, do people think that aptitudes are not a very good indicator of ability ? I know that plenty of us have failed to get past the aptitude stages of sponsorships at some time or other but still got accepted later/gone on the get frozen ATPL and a job.
Cheers
Schooner