Have used dremel chain saw sharpening bits in EPP with great success. less shreddering than the router bits. the stones tend to gently melt the EPP rather than rip it apart. kevin kavaney RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.