I am going to be getting some oil next week, so looking at buying a nail/dome for my bong. What would you guys say would be the better purchase.....? http://www.etsy.com/uk/listing/169680169/ti-nail-domeless-titanium-nail-fits-18mm?ref=sr_gallery_6&ga_search_query=titanium+nail&ga_order=most_relevant&ga_view_type=gallery&ga_ship_to=GB&ga_ref=auto3&ga_search_type=all or http://original-glass.co.uk/index.php/products/concentrate-oil-accessories/oil-dome-nail.html Thanks for your input in advance