Complex sentence: There was very little commonality of parts between the Gull and the Mew Gull, which used a fixed conventional oleomatic main undercarriage and a fully castoring tailskid.
Split into simpler sentences: There was very little commonality of parts between the Gull and the Mew Gull. The Mew Gull had a fixed conventional oleomatic undercarriage with a fully castoring tailskid.