Golden Slipper-winning trainer Bruce Brown has cut his team back to four horses but he thinks they are all potential top-liners.

His mare Spinifex Fire ($6) proved Brown at least partly correct when she impressively won the Adrenaline Thoroughbred Syndications Handicap at Doomben on Wednesday.

Brown, the son of legendary kiwi trainer Syd Brown, won the 2002 Golden Slipper with Calaway Gal but has gradually scaled back his team to a one-man operation.

"I've only got four horses at the moment but they are potentially four good ones," he said.

"Spinifex Fire is going to be very good once she matures in the head."

Spinifex Fire is by little-known sire Tanabota, a three-quarter brother to Group One-winning filly Headway who now stands at Woodwinds Stud, near Beaudesert.

A Redoute's Choice stallion, Tanabota was retired because of injury after three starts that netted a Geelong win.

Gold Coast trainer Len Wheeler, who has only 10 horses in work, looks to have a nice two-year-old in Charlotte Grace who won the Mekoe Accessories Handicap (1110m).

"She won a Gold Coast trial in good fashion so we expected her to race well but we didn't expect her to be half slow to go," Wheeler said.

Charlotte Grace is raced by a group of long-term racing friends who lease the filly from former Racing NSW boss Gary Pemberton.

Individually they have raced over 100 horses but as a group they have had several good horses including Kalkie Kane who was also trained by Wheeler.

Meanwhile, Brisbane businessman Mark Templeton had to wait 20 minutes before he could celebrate a birthday win with his horse Tiger Dimejan in the CBS Air Conditioning Handicap.

County Command ($5) beat Tiger Dimejan by a short half-head but Tiger Dimejan's jockey Michael Cahill fired in a protest alleging interference in the final 200m.

Steward upheld the protest and promoted Tiger Dimejan to first.

Templeton, who is well known in Brisbane rugby union circles, declared the result the perfect 53rd birthday present.