Hi, attempted to fit new pushrod tubes, from Megabug, yesterday. Could not get them all the way in. Tried everything, cleaned up head and block well, lubed new seals with oil, tried me on mole grips with the Misses helping with broom handle force. Would not go in. In desperation fitted the new seals back with the old tubes. All went in fine, so just as people describe, quite a bit of force from wooden broom handle but nothing excessive and you know when it’s in as you get the sudden give. Anyway all leaked to same extent as they did before! Really stuck here. Any ideas?