The AXLerator isn’t exactly the first narrow body aluminum yo-yo, but it’s probably the first one designed specifically for looping. Up until it’s release, aluminum yo-yos were designed as “sleeping” yo-yos, but Custom didn’t see any reason that aluminum yo-yos couldn’t be used for two handed looping tricks so they gave it a shot.
The AXLerator is a narrow body “Imperial” type design. Like the Roadster by Playmaxx, the sides are concaved, but since the body is hollow, this doesn’t exactly remove middle weight.
The yo-yo didn’t catch on, the two handed yo-yo market was dominated by the Yomega Raider (which is still a standard) and the AXLerator didn’t really offer any improved looping action. I think the biggest flaw in Custom’s design is it’s lack of gap adjustment. Even with brand new “tub tread response” (Custom’s friction sticker) the yo-yos would loop upward. This would only get worse as the stickers got worn in, thus increasing the gap.
The AXLerator appears to be heavy for a looping yo-yo but it’s only 1 gram heavier than the Raider.
Gap issues aside, the yo-yos are very pleasant to use and loop surprisingly well. Actually, if Custom could just narrow the gap I’d quite enjoy this yo-yo.