I have 600 hours on Lord mounts purchased from Vans. The store now shows both Barry and Lord products at $185 vs $270. Is this a case of price equaling quality or not? Spruce has "aerobatic" mounts for Vans at $493 each. RV4, Lyc 0-360, parallel valve, dynafocal mount. Most every local flight involves aerobatics between -1.0 and +3.5 G. Thanks for any input.