I always turn back to this page to check the format of each component in Bitcoin TX, very good visual from Jamal nostr:nprofile1qydhwumn8ghj7cn4vd4k2apwvdhhyctrd3jjuum0vd5kzmqpzemhxue69uhkummnw3ezuenfd3khwetz9ecxcqpqgxqyeea3xspkd68mxlxsvvk3gdzdd555u504ynwpdj0ghg503mvq4utn6t
https://bitcoindevs.xyz/decoding/transaction-structure