Pretty sure I used a 324mm link kit like this https://www.ebay.co.uk/itm/403986815566?hash=item5e0f7d9a4e:g:0l8AAOSwoO9jbHOB&amdata=enc%3AAQAHAAAA4HtiCdHNnFENhAr3COXsRrne1gb5bKQ1OU0lpm8AVJP9HGd4yzluFfaqAnfyJg3kLZgfMfpAzRCey1xRYb%2B49aRCCOy3XAX3fqB2J15AbqlaweOgXQ2Z47tL3Ewts3KIJV2eDtXpyqXGVSX9XGUsdUThm85KY43AXU2D4yRaxULxykFtECfiDxQ9t18hllhj1704n81q%2BupaHgdkzrXDTf5qw%2BxV%2BNQsIcz7jYWcJBDBxmKXXbBTp6YqpxDcxcgv0%2BLqjo7ZrQDg8T0RK7i1odDYhWPE8VrqXNxq8upGTYgn|tkp%3ABFBMnNSWgLxh