The PT-1000 is effectivly a PT-900 with a treadle controlled speed pot. With the change from PT-900 to PT-999, the circuitry of the PT-1000 changed as well. The later version is easily to be distinguished by the added LED.
01/27/2023: ToneHome is still looking for an Ibanez CS-505 narrow box first issue with flying finger side graphics. Any lead is highly appreciated. Other than that we're looking for an Ibanez AD3000 Professional Analog Delay & Multi Flanger. Please submit your offers or leads here: e-mail