If you look at the quarterlies released in Oct 17 and Jan 18 R&D...

If you look at the quarterlies released in Oct 17 and Jan 18 R&D spend = $0.81m & $1.44m resulting in a $1.23m R&D payment in May 2018
Go back to the previous period tax year 16-17, the R&D spend was approx $6.7m looking at the full year report resulting in a $3.1m rebate in Dec 17
According to three quarterlies released this CY, FTT claim to have spent around $5.5m on R&D. If you add on the current quarter it would be fair to assume the claim will be based on $6m-$7m spent this calendar year. This is why I guess the rebate will be near $3m and be paid in May/June next year working on a 40%-50% payout ratio.