Hi I am new to swiftlet keeping. I have just finished reading the thread from v1 to v3 and just wanted to introduce myself here. I have a piece of agricultural land in N9 which is sitting idle and i'm considering swiftlet keeping to utilise the piece of land. Any1 interested in JV please PM me. On a separate note, I have heard 2 different arguments for having external tweeters in your BH. The 1st being that when the swiftlet is attracted by your external sound and come to your BH you need to have external tweeters in your BH to pull the bird to the venture to the back of your BH. The other argument is that you should not mix external and internal sounds inside your BH. Personally, I feel that the 1st argument is more logical to me. Any sifus want to comment?