I just purchased a new AP .061 Wasp engine. The newer engines no longer have the prop bolt and such and now have a typical prop shaft with a spinner on the end. The manual calls for APC props to be used for break in and so on. I purchased the recomended APC prop but the props center hole is too large for the AP engine shaft. Is this due to AP switching to a spinner instead of the typical prop bolt? Has anyone else had a problem like this? Please let me know if there is a solution out there for me. Thanks. Chris