trailer question

[evknot0127]

hey guys i am a new member thats going to have a bunch of questions lol but i just picked up a seacraft the other day...the boat is a 71 20' SF seacraft with a f115 yamaha on it...(aboslutely love the boat and motor) but the trailer i kinda need some help on...the trailer i bought it with is a bunk trailer but some of the brackets i guess you would call them? (peices that hold up the bunks) are rusted and im kinda a freak about having all good shit.. my buddy on the other hand said he would sell a pretty much brand new roll trailer to me for cheap? do you guys have any preferences on which trailer is better ( bunk or rollers) and is there a way to convert the roll trailer into a bunk trailer? any info is appreciated thanks guys and happy to finally own a seacraft!!