I have the same Royal RC 40 scale that Cheech has pictured. I bought it at Staples for $90 plus tax. I have found it to be very accurate. A nice feature is the hold button. If you can not see the display with the plane balanced on the scale, you can press the hold button and remove the plane to read the display. I have used it on planes up to a 105 " Aeroworks Edge 540T at 27 lbs, 6 oz.