Here are the Compression Numbers from the Manual:
Compression pressure (at sea
level)
Minimum
1,390 kPa (13.9 kg/cm2, 198 psi)
Standard
1,600 kPa (16.0 kg/cm2, 228 psi)
Maximum
1,790 kPa (17.9 kg/cm2, 255 psi)
Hope it works out to something more simples and less expensive for you.